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• Table 2.05.8 -17a LORENCITO GROUND WATER ANALYTICAL PARAMETERS <br />Comparison of Pre- mining vs. Post Mining Data <br />TR -16 2.05 -109 (Revised 01/11/10) <br />MWLC -2 U stream <br />MWLC -1 Downstream <br />Pre -Mine Post -Mine <br />Mean Mean <br />Percent <br />Change <br />Pre -Mine Post -Mine <br />Mean Mean <br />Percent <br />Change <br />Parameters Year <br />Depth, Mean <br />12.4 14.1 <br />6.9% <br />16.8 16.7 <br />-0.4% <br />pH Mean (field) <br />7.7 8.1 <br />2.6% <br />7.7 8.1 <br />2.8% <br />Conductance, Mean <br />451.6 846.8 <br />43.8% <br />439 1008 <br />64.8% <br />Temperature, Mean <br />11.2 12.4 <br />5.6% <br />11.5 14.3 <br />12.5% <br />Iron (total) <br />7.5 5.0 <br />- 16.4% <br />27.8 5.0 <br />-41.0% <br />Iron total recoverable <br />7.7 5.8 <br />- 12.3% <br />26.4 2.9 <br />-44.6% <br />TDS @ 180C <br />306.8 475.0 <br />27.4% <br />323.3 609.2 <br />44.2% <br />Total Alkalinity <br />216.8 294.3 <br />17.9% <br />208.0 366.7 <br />38.1 <br />Manganese (total) <br />0.2 0.1 <br />- 27.3% <br />0.94 0.07 <br />-46.4% <br />Manganese (dissolved) <br />0.0 0.0 <br />-24.6% <br />0.41 0.08 <br />- 39.9% <br />Sodium dissolved <br />43.3 93.7 <br />58.2% <br />47.2 136.2 <br />94.2% <br />Chloride <br />3.7 60.0 <br />768.2% <br />5.0 74.0 <br />690.0% <br />Sulfate <br />58.8 54.8 <br />-3.3% <br />58.0 53.4 <br />-4.0% <br />Calcium (dissolved) <br />51.1 55.6 <br />4.4% <br />46.4 49.7 <br />3.6% <br />Magnesium ( dissooved) <br />15.9 19.1 <br />10.0% <br />15.4 18.5 <br />10.1% <br />Potassium dissolved <br />1.7 2.1 <br />12.4% <br />2.1 2.5 <br />10.6% <br />SAR <br />1.4 2.9 <br />57.2% <br />1.6 4.2 <br />86.0% <br />Hardness <br />193.3 218.2 <br />6.5% <br />179.3 200.5 <br />5.9% <br />TR -16 2.05 -109 (Revised 01/11/10) <br />